Emergency rash in babies mainly presents as a result of herpes virus infection in infants less than one year old. The rash is usually characterized by two things: 1) a febrile rash and 2) a rose-colored maculopapular rash. The rash is usually rapid, starting with a high fever and sometimes reaching 40°C. The fever lasts for about 3 or 4 days and then the temperature suddenly drops, with a rash appearing at the same time. The rash is characterized by rose-colored papules that start on the neck, chest, abdomen, back, and other trunk areas, and then spread to the extremities very quickly. The rash is mostly unilateral, with a few cases of fusion, and the rash will slowly fade away on its own in about 1-2 days, leaving no pigmentation.